下列不等式变形正确的是[ ]
A.由a＞b，得ac＞bc
B.由a＞b，得-2a>-2b
C.由a＞b，得-a＞-b
D.由a＞b，得a-2＜b-2
答案：B
832÷40的商的最高位是______位，430÷50的商是______位数．
______Jenny.______name is Tom. [ ]
A. I'm, My
B. Her, My
C. I'm, His
